I think you're sorely mistaken that these books wouldn't be published today (and I say that as a Joyce scholar who works on how problematic parts of Ulysses are). There's a difference, I think, between a work of outright white supremacy being published (as the White Plague appears to be) and a book that makes people uncomfortable, like the titles you list above. Lolita is supposed to make you uncomfortable. It reveals the pervasiveness of pedophilia, and how easy it can be to sympathize with an abuser/rapist.

I don't think this is "cancel culture" so much as "consequences for one's actions." The writer of, and the editor who greenlit, The White Plague made a huge mistake in assuming that racism will fly in today's publishing world, when it won't. People do not need to be tolerant of intolerance, and taking their money and their work elsewhere is a natural consequence of publishing something that is so obviously offensive to so many people.